Folding knife



FIG. 1 is a front view in elevation of a folding knife illustrated in open position, showing my new design, the rear view being a mirror image thereof;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top elevational view thereof;

FIG. 5 is a bottom elevational view thereof; and,

FIG. 6 is an alternate front elevational view of the folding knife illustrated in FIG. 1, shown in folded position. 

The ornamental design for a folding knife, as shown and described. 